.clock-flip{

  .clock-item{
    position: relative;
    /* width: 100px;
    height: 160px; */
    perspective: 600px;
    /* transform-style: preserve-3d; */
  }
  .clock-item::after{
    content: ' ';
    width: 100%;
    height: 2px;
    background-color: rgba(0,0,0,.6);
    position: absolute;
    top: 50%;
    left: 0;
    margin-top: -1px;
    z-index: 4;
  }
  .clock-num{
    /* perspective: 400px; */
    position: absolute;
    width: 100%;
    height: 50%;
    overflow: hidden;
    text-align: center;
    /* border-radius: 5px; */
    text-align: center;
    /* display: flex;
    justify-content: center; */
    /* font-size: 110px; */
    font-weight: bold;
    color: var(--timeColor);
    backface-visibility: hidden;
    transform-style: preserve-3d;
    background: var(--cardColor);
  }

  .up{
    /* line-height: 160px; */
    top:0;
    left:0;
    border-radius: 5px 5px 0 0;
  }
  .down{
    line-height: 0;
    top: 50%;
    left: 0;
    border-radius: 0 0 5px 5px;
  }
  .up-front,.down-front{
    z-index: 2;
  }
  .down-front{
    transform-origin: center top;
  }
  .up-back{
    z-index: 3;
    transform-origin: center bottom;
    transform: translate3d(0, 0, 0) rotateX(180deg);
  }
  .clock-item.active .down-front{
    transition: transform .5s linear;
    transform: translate3d(0, 0, 0) rotateX(180deg);
  }
  .clock-item.active .up-back{
    transition: transform .5s linear;
    transform: translate3d(0, 0, 0) rotateX(0deg);
  }
  .separate{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 1em;
    /* width: calc(var(--size) * .4); */
  }
  @keyframes clockPoint {
    0% {
      background-color: var(--cardColor);
    }
    100%{
      background-color: rgba(255, 255, 255, .68);
    }
  }
  .separate-item{
    width: .25em;
    height: .25em;
    border-radius: 3px;
    background-color: var(--cardColor);
  }
  .separate-item:nth-of-type(1) {
    margin-bottom: 10px;
  }
  .separate.active .separate-item{
    animation: clockPoint .4s linear 0s 1;
  }

}